On August 6, 1922 — In St. Louis, Walter Johnson gives up the first grand slam of his career, a 3rd-inning shot by Jack Tobin, as the Browns top the Senators, 8 – 4. George Sisler is 2 for 2 against the Big Train, as Urban Shocker picks up the victory.

Source:
Baseball Reference August 6
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game